Improved compound mould-board for plows



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SOLOMON H. DWIGHT, Or DEOATUR, ILLINOIS, AND CALVIN' WELLS, OIfv-PITTSBURG, PENNSYLVANIA.

kLatas Patent No. 90,512, dated May 25, 1869.

IMPROVElD COIMPOUND MOLD-BOARD FOR FLOWS.

The Schedule referred to in these Letters Patent and making part of the sama.

To all whom it may concern:

. Be it known that we, SOLOMON H. DWIGHT, of Decatur, Illinois, and CALVIN WELLS, of Pittsburg, Pennsylvania, have invented an Improvement in the Man ufacture of Mould-Boards for Plows; and we do hereby declare the following. to be a full, clear, and .exact description of the same.

Our invention consists of a mould-board for plows, made of steel, welded between two plates of iron, properly shaped and hardened, and then so ground as to remove the'iron from one side `and expose a facing of hardened steel, all substantially as described hereaiter.

The object of our inventionis to produce a perfect, nnwarped mould-board, in' which all the advantages of both steel and iron are available. f

In order to enable others skilled in the art to make our inventionV` we ,will nowtproceed to describe the mode of carrying it into effect, reference being had tO the accompanying drawing, which forms a part of this specification, and in which the figure represents sufcient of the mouldboard of a plowI to illustrate our invention.

Many attempts have been made, in the manufacture -Letters Patentson in the contractible properties of the two materials A mould-board for plows, made of steel, Welded between 4two plates ofV iron, then properly shaped and f hardened, and afterward so groundas to remove the iron from one side and expose a facing of steel, all sub' stantially as and for the purpose hereinset forth.

In testimony whereof, we have signedournames to this specification, in the presence of two subseribing witnesses.

SOLOMON H. lWV'IGdEIl. CALVIN WELLS.

Witnesses to the signature of S. Hl :DWIGHT:

HENRY B. DURFEE, Y B. K. DURFEE.

Witnesses'to the signatnre of CALVIN WELLS: RODOLF RORNIG, HENRY SOHWER. 

